[ahy-som-uh-reys, -reyz]
noun Biochemistry.
any of a class of enzymes that catalyze reactions involving intramolecular rearrangements.

1940–45; isomer + -ase Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
isomerase (aɪˈsɒməreɪs)
any enzyme that catalyses the conversion of one isomeric form of a compound to another

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

isomerase i·som·er·ase (ī-sŏm'ə-rās')
One of a group of enzymes that catalyzes the conversion of one isomer into another.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Britannica


any one of a class of enzymes that catalyze reactions involving a structural rearrangement of a molecule. Alanine racemase, for example, catalyzes the conversion of L-alanine into its isomeric (mirror-image) form, D-alanine. An isomerase called mutarotase catalyzes the conversion of alpha-d-glucose into beta-d-glucose. cf. ligase, lyase.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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